Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2017
Forfattere
Jan Feranec Tomas Soukup Gregory Taff Premysl Stych Ivan BicíkSammendrag
This chapter presents an analysis of land cover changes in Eastern Europe between 1990 and 2006, assessed using CORINE (Co-ORdination of INformation on the Environment) Land Cover (CLC) datasets. The plethora of potential land cover change categories were condensed into seven categories of major land use change processes: urbanization, agricultural intensification, agricultural extensification, afforestation, deforestation, construction and management of water bodies, and other changes. The amounts of each change category and their spatial distributions are summarized, and the change categories were also mapped to show the relative amounts of change (per 3 × 3 km2) between 1990 and 2000 and between 2000 and 2006. The results showed that while more afforestation than deforestation was observed in the first period, the reverse was true in the second period, when deforestation outpaced afforestation. Urbanization and suburbanization were major processes in Eastern Europe, particularly around existing major cities, and the speed of this process generally increased from the first to the second period. Both the intensification and extensification of agriculture were common during both periods, but a larger effect was observed in the first period. Overall, land use changes were highest in central Europe and the Baltic countries and lowest in southeast Europe.
Forfattere
Bjørn Kløve Hanne Margrethe Lund Kvitsand Maria J. Gunnarsdottir Sylvi Gaut Tarja Pitkänen Sigurdur Gardarsson P. Rossi Ilkka MiettinenSammendrag
Det er ikke registrert sammendrag
Forfattere
Marit JørgensenSammendrag
En variabel vinter i 2017 har igjen ført til betydelige vinterskader på eng flere steder i landet. År med betydelige vinterskader ser ut til å komme med jevne mellomrom, og fører både til store avlingstap og til kostnader med reparasjon av eng med vinterskade. Hva er overvintringsskader og er det noe vi kan gjøre for å unngå dem?
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Lars NesheimSammendrag
Det er ikke registrert sammendrag
Forfattere
Christian PedersenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Inga GreipslandSammendrag
The report presents results from monitoring of nine rivers and creeks in the Halden Watershed in the period 1 May 2016 to 1 May 2017. Water samples were collected every 14th day and analysed for total phosphorous (TP) and suspended sediments (SS). Every 28th day the samples were also analysed for dissolved phosphate. Results from previous monitoring in the period May 1th 2012 to May 1th 2015 are found in Greipsland (2015) and Greipsland (2016.
Sammendrag
Rapporten gir resultater fra overvåkingen av Vansjø, Bindingsvann, Langen, Våg, Mjær og Sæbyvannet, samt i elver og bekker i vannområde Morsa i perioden 1. november 2015 – 31. oktober 2016. Resultatene inkluderer oversikter over konsentrasjoner av næringsstoffer og suspendert sediment i alle stasjoner, samt tarmbakterier i elver og bekker, og klorofyll og algetellinger i innsjøer. Et infoark som er satt inn bakerst i rapporten oppsummerer resultatene.......
Sammendrag
Production of inoculum of Colletotrichum acutatum from both previously infected and overwintered tissue, as well as newly developed plant tissue of sour cherry (Prunus cerasus), was studied in southern Norway. Plant parts were sampled from commercial, private, or research orchards, and incubated for 2 to 14 days (time depended on tissue type) in saturated air at 20°C. In early spring, abundant sporulation was found on scales of overwintered buds and shoots. A mean of 35% infected buds in four cultivars was observed, with a maximum of 72% of the buds infected in one of the samples. Over 3 years, the seasonal production of overwintered fruit and peduncles of cv. Fanal infected the previous year was investigated. In all three years, the infected plant material was placed in the trees throughout the winter and the following growing season; in two of the years, fruit and peduncles were also placed on the ground in the autumn or the following spring. Old fruit and peduncles formed conidia throughout the season, with a peak in May and June. Spore numbers declined over the season, but the decline was more rapid for plant material on the ground than in the trees. On average over 2 years, 68.7, 24.0, or 7.3% of the inoculum came from fruit placed in the trees, placed on the ground in spring, or placed on the ground the preceding autumn, respectively. The number of fruit and peduncles attached to the trees in a planting of cv. Hardangerkirsebær was followed from February to July one year, and although there was a decline over time, fruit and/or their peduncles were still attached in substantial numbers in July, thus illustrating their potential as sources of inoculum. In observations over 2 years in a heavily infected orchard of cv. Stevnsbær, 75 and 47% of flowers and newly emerged fruit, respectively, were infected. Artificially inoculated flowers and fruit produced conidia until harvest, with a peak in mid-July. It may be concluded that previously infected and overwintered, as well as newly emerged tissue of sour cherry, may serve as sources of inoculum of C. acutatum throughout the growing season.